ОKО-22М-UT Ultrasonic Flaw Detector

Intended use of the ОKО-22М-UT ultrasonic flaw detector

The ОKО-22М-UT is available in several configurations with the varying number of ultrasonic channels and result processing functions.

The flaw detector is a standalone device. While connected to the PC via the Ethernet port, the ОKО-22М-UT can become part of the multi-channel testing system with a few UT channels connected to the PC via the switch unit.

Application of Ultrasonic Testing Techniques in Industries

Production sector, test object	Regulatory Documentation	Required number of channels	Operating frequency, MHz	Testing techniques
Metallurgy, testing the flat rolled steel	EN10160, ASTM 578/A578M-96, A435A, ISO 12094	60-100	2-5	Immersion or contact
Metallurgy, testing the rolled round steel bars	EN 10308, EN 10228-3, ASTM E – 2375, MS-STD – 2154	3-20	2-10	Immersion or contact, testing velocity is up to 2 m/s
Engineering, testing the pipe welded joints	API 5L, API5 CT, EN 10246-17	12	2-5	Immersion or contact, velocity is up to 2 m/s
Engineering, testing the pipe body, thickness gauging	API 5L, API5CT, EN 10246, ASTM E1816-96	56	2-5	Immersion or contact, velocity is up to 1 m/s. Resonance-frequency technique for measuring the pipe wall thickness – from 0.2 to 5.0 mm.

Several ultrasonic flaw detectors ОKО-22М-UT

Figure 1 – UT channel "ОКО-22М"

Scheme for connecting the ОКО-22МUT channels

Figure 2 - Structural scheme for connecting the UT channels

Application of ОКО-22М-UT ultrasonic flaw detector in the system for UT of pipe ends, Application of ОКО-22М-UT ultrasonic flaw detector in the rotary system for tubes testing, Application of ОКО-22М-UT ultrasonic flaw detector in the system for immersion non-destructive testing of cylindrical objects

Parameter	Value
PULSER
Pulse mode	Spike pulser, Square-Wave pulser
Pulse Voltage (SQ mode)	120-300 V in steps 10 V with tolerance 10%
Pulse falling/rising time	5 ns
Pulse Width (SQ mode)	20 – 500 ns in steps 10 ns with tolerance 10%
PRF (SQ mode)	15 – 2000 Hz in steps 5 Hz, 3 automatic modes: Auto Low, Auto Med, Auto High, Manual
Pulse Voltage (spike mode)	Low (100 V), High (400 V)
Pulse energy (spike mode)	Low (30 ns), High (100 ns)
PRF (spike mode)	15 – 8000 Hz in steps 5 Hz, 3 automatic adjustment modes: Auto Low, Auto Med, Auto High, Manual
Damping	50, 62, 150, 400
RECEIVER
Gain	0 to 110 dB adjustable in steps of 0.2, 0.5, 1, 2 dB
Receiver input impedance	400Ω±5%
Receiver bandwidth	0.2-27 MHz (- 3 dB)
Digital filter setting	Eight digital filter sets standard (0.2-10 MHz; 2.0-21.5 MHz; 8.0-26.5 MHz; 0.5-4 MHz; 5-15 MHz; 5-15 MHz; DC-10 MHz )
Rectification	Fullwave, positive halfwave, negative halfwave, RF
Amplitude measurement	0-110%
Reject	0-80% FSH
Units	Millimeters, inch or microseconds
Range	1 to 6000 mm
Velocity range	1000 to 10000 m/s in steps of 1, 10, 100, 1000 m/s
Thickness measurements range	0.6 to 6000 mm
Probe angle	00 to 900 in steps 0.10, 1.00, 100
DIGITAL SPECIFICATION
ADC	10 – bits with the sampling rate 100 MHz
A-Scan buffer	8 KB
GATE
Measurements gates	2 fully independent three-level gates for amplitude and time of flight measurement. Additional gate for acoustic coupling control. Additional gate for immersion control. Special-purpose gate of the Automatic gain control (AGC).
Start Gate	Variable over entire range
Width Gate	Variable over entire range
Gate height	Variable from 2 to 100% FSH
MEASUREMENT SPECIFICATION
Result display	A-scan, B-scan, C-scan, D-scan, TOFD scan
DAC/TCG	Dynamic range is up to 110 dB. Number of points is 32. Building TCG curve by DAC
DGS	Automatic building of up to 3 curves for different equivalent diameters Calibration at calibration blocks and testing objects Building TCG curve by DGS
CONNECTORS
Probe connector	2 BNC or 2 Lemo 1S
USB port	USB-2.0
Ethernet	+
Alarm output	+
Encoder	1 Lemo (with the option of two encoders operation)